### Abstract

This study was conducted to apply sign reversal of phase, space inversion and time reversal to wave functions with negative amplitude. The negative amplitude occurred when ± signs are given to each of three terms including amplitude when the square root was taken to solve a differential equation. Although a phase shift of π changed negative amplitude into positive amplitude, there were some mathematical operations that might be expected to avoid negative amplitude. The results obtained were as follows. Space inversion showed reversing the directions of all three-space coordinates of the wave. Time reversal showed the wave moving backward in time. The product of sign reversal of phase and space inversion or time reversal gave positive amplitude to the wave. Boldly speaking at the risk of making mistake, these mathematical operations suggested that the wave with positive amplitude and sign reversal of phase moved along reversal directions of space and backward in time. They were summarized by the transformation of coordinates from (ir, x, y, z, t, -W_{o}) to (-ir, -x, -y, -z, -t, W_{o}). It was suggested from the present study that the negative amplitude in wave functions was hypothetically avoided by applying sign reversal of phase, space inversion and time reversal.

Original language | English |
---|---|

Pages (from-to) | 357-359 |

Number of pages | 3 |

Journal | Journal of the Faculty of Agriculture, Kyushu University |

Volume | 54 |

Issue number | 2 |

Publication status | Published - Oct 2009 |

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### All Science Journal Classification (ASJC) codes

- Agronomy and Crop Science
- Biotechnology

### Cite this

**Introducing viewpoints of mechanics into basic growth analysis - (XII) applying sign reversal of phase, space inversion and time reversal to wave functions with negative amplitude.** / Shimojo, Masataka.

Research output: Contribution to journal › Article

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TY - JOUR

T1 - Introducing viewpoints of mechanics into basic growth analysis - (XII) applying sign reversal of phase, space inversion and time reversal to wave functions with negative amplitude

AU - Shimojo, Masataka

PY - 2009/10

Y1 - 2009/10

N2 - This study was conducted to apply sign reversal of phase, space inversion and time reversal to wave functions with negative amplitude. The negative amplitude occurred when ± signs are given to each of three terms including amplitude when the square root was taken to solve a differential equation. Although a phase shift of π changed negative amplitude into positive amplitude, there were some mathematical operations that might be expected to avoid negative amplitude. The results obtained were as follows. Space inversion showed reversing the directions of all three-space coordinates of the wave. Time reversal showed the wave moving backward in time. The product of sign reversal of phase and space inversion or time reversal gave positive amplitude to the wave. Boldly speaking at the risk of making mistake, these mathematical operations suggested that the wave with positive amplitude and sign reversal of phase moved along reversal directions of space and backward in time. They were summarized by the transformation of coordinates from (ir, x, y, z, t, -Wo) to (-ir, -x, -y, -z, -t, Wo). It was suggested from the present study that the negative amplitude in wave functions was hypothetically avoided by applying sign reversal of phase, space inversion and time reversal.

AB - This study was conducted to apply sign reversal of phase, space inversion and time reversal to wave functions with negative amplitude. The negative amplitude occurred when ± signs are given to each of three terms including amplitude when the square root was taken to solve a differential equation. Although a phase shift of π changed negative amplitude into positive amplitude, there were some mathematical operations that might be expected to avoid negative amplitude. The results obtained were as follows. Space inversion showed reversing the directions of all three-space coordinates of the wave. Time reversal showed the wave moving backward in time. The product of sign reversal of phase and space inversion or time reversal gave positive amplitude to the wave. Boldly speaking at the risk of making mistake, these mathematical operations suggested that the wave with positive amplitude and sign reversal of phase moved along reversal directions of space and backward in time. They were summarized by the transformation of coordinates from (ir, x, y, z, t, -Wo) to (-ir, -x, -y, -z, -t, Wo). It was suggested from the present study that the negative amplitude in wave functions was hypothetically avoided by applying sign reversal of phase, space inversion and time reversal.

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M3 - Article

AN - SCOPUS:70450205738

VL - 54

SP - 357

EP - 359

JO - Journal of the Faculty of Agriculture, Kyushu University

JF - Journal of the Faculty of Agriculture, Kyushu University

SN - 0023-6152

IS - 2

ER -